Mold-filling machine.



INVENTOR,

2 SHEETS-11331 1 o of o" go o o o AT RN.

J. ANIFERSON. mom) HLLmG mom's.

LPPLIOATIOK TILE) SEPT. 25, 1909.

Patented Feb 15,1910

JAMES ANDERSON.

M NESSES:

J. ANDERSON. 1 MOLD FILLING HAGHINE. .APPLIGATIOK FILED SEPT. 25,1909.

949,745. Patented Feb.15, 1910.

2 SHEETS-SHEET 2.

WITNESSES: E NTC i 12M 51M .JAMEsANnERsoN,

TORNEY.

- as for the casting of gear wheels-the molder more or less violently, into the flask, so as to 'molder to use a hand-ram or, in later years, a 'pneuma 1c ram.

JAMES ANDERSON, OF GOLD SPRING, NEW YORK.

MOLD-FILLING MACHINE.

Specification of Ietters Patent.-

Iatented Feb. 15, 1910.

Application filed September 25, 1909. Serial No. 519,555.

To all whom it may c ncern:

,Be it known thatl, Janna Annnnson, a citizen of the United States of America, and a resident of Cold Spring, county of Put 11am, State of New York, United States of America, have invented a new and useful Mold-Filling Machine; and I do hereby declare the following to be a full, clear, and exact description of the same.

The present invention relates to machines for delivering sand into fiasks for the making of sand molds, to be used thereafter in the casting of-metal articles, such as iron col'umns, column-bases, etc.

In the making of molds, ithas always been desired that the sand shall be evenly rammed, or packed, in the flask. To as sure this result, it has been usual for the Both methods are slow, in order to assure uniform packing, as far as possible, and are, consequently, expensive. For the production of certain moldssuch has sometimesthrown, or flung, the sand,

attain, by the throwing force, the desired packing of the sand.

In prior machines, known as gravity molding machines, an endless conveyer has been employed, and buckets (attached at intervals to the conveyor) have been, in succession, filled with sand, drawn to a considerable height, above a flask, and (by mere inversion of the buckets) the sand has been dropped into the flask. My machine differs therefrom in the provision of means whereby sand is thrown, or flung, into the flask.

Referring to the accompanyin drawings, Figure 1 is a side view of one form of my machine, a side plate being removed to permit sight of certain parts of the apparatus; Fig. 2 is a top view of that machine; Fig. 3 is a detail of certain parts shown in Fig. 1: Fig. 4 is an edge view of the parts of Fig. 3: E Fig. 5 is a top detail view, illustrating the mounting of the carrier-frames upon a shaft,

and also illustrating a sand-holder of variable capacity; Fig. 6 is an enlarged fragment of Fig. 5, and Fig. 7 is a sectional view, at the dotted line of Fig. 6, of a bucket element of the sand-holder. The machine shown in the drawings comprises a frame, a driven shaft, a plurality of carrier-frames rotatable with and yieldmgly connected with said shaft, sand-holders carried by said frames, means for assuring a supplyof sand to said holders, and means for giving each carrier, separately, a throwing movementso as to cause the sand to be flung from the sand-holders, with some forceand in excess of that due to gravitv aloneint a flask.

Referring especially to Figs. 1 and 2, the frame of the machine is shown as made up of beams or channel irons, A, A A, A A. A, A. Said frame may be mounted upon wheels, 13, so as to be easily moved along tracks, or otherwise made portable, -in order to be moved from place to place in a shop or from one shop toanother.

C indicates a hopper, or lower part of a hopper, for storage of sand. It may have any usual -discharge o ening, c, and the amount of discharge 0 sand may be controlled by the gate a, which is moved as desired through the intermeshing rack c and gear 0 the latter being connected with a shaftcarrying. a hand-wheel at one end thereof. The hopper discharges sand into a chute ha ing a bottom D and side flanges, or walls, D, the lower part D of which is deepest, so as to have an enlarged chamber through which the sand-holders are first drawn, as hereinafter described. The forward end of the chute is curved upwardly, at (I, so as to retain sand in the chute.

A regulating frame, E, is provided at the front of the machine-that is to say at the left hand side of Fig. 1-and said frame is mounted to rock upon a shaft, F. That shaft,

in the machine shown, is the driven shaft of the machine, and is mounted in the upper ends of the beams A it controls the filling of each sandholder as well as the throwing of sand therefrom. The means for rotating said shaft form no part of this invention, and any suitable motor or connections may be used. Figs, 1 and 3 show a three-armed casting G keyed to said driven shaft, and rotatable therewith. The arms, G, G and G are alike as to construction, and each has an oilset stop, g, 9 and carries a pin, g, g 1, at one side thereof. Each arm of the castinghas three functions, it draws a carrier after it, it exerts a throwing or flinging strain on that carrier, and it arrests the throw of the carrier, so as to expel the sand, more or less violently, from the corresponding sand-holder.

The machine is rovided with sand-holders, corresponding in number with and traill l l 1 l ing behind the arms of the carrier. Insurccssion, these holders are filled with sand, and at a coimnon pointof discharge, the San-d is thrown from 'each holder iiito or f a flash. \l'ith that form of my mahcwu in the drawings, the sand-holders are carried at the outer, or free, ends of carriers, or ti'aiues, mounted to have both rotation with the shaft F and to have slight rocking movements thereon. Said carriers are designated, in the drawings, by H 1?, and H, and each may be in the form of a frame having two side arms, H and H,

, each arm being adapted to rocl; by means oi collars (it and it) surrounding the shaft, as shown in Fig. 5. The outer ends of each pair of arms may be connected by a brace, as 75. in Fig. 2, or frame bars, H and H as in l ig. may be useful for that purpose,

Aione side, each carrier arm may have a pin and a s 111'12' will be connected at one I n n u n n of a ends with one or said pins and with one or" the pins, g", 5/ or y, aforesaid. 1nasniuch as the carrierframes are mounted so as to rock on the shaft F, the said springs, 1 1*, or 1 each tend to draw the corresponding arm H, Iii-H to the companion arm, G, 1?, G, of the casting G, so that the normal relation of the parts is that shown at the lowermost and at the right hand arms of F ig.

While, as before stated, the sand-holders may be of any suitable kinchyet I prefer to make use of long and comparatively narrow buckets, J, carried at the outer ends of the carrier frames. The buckets employed may each be divided into compartments, J, as in Fig. 2, or that division may be attaincd by having a succession of bucket elements, each separately removable for renewals or to permit the sand-holder, according as it is made up of more or less of the elements, to be variable as to capacity, varyirrg the width of the body of sand thrown from ib a feature of importance, where it is desired that the machine shall be used to pack any of dill'crcut widths of molds hour using too much or too little sand.

\Vhcre a sand-holder to have a succession of mcltebclements, I may take advantage of the structure shown in Figs. 5, (3 and T, in which each budiet-elernent is separately connected with and removable from frame-bars H and 11', these latter being the webs of the. channel bars which constitute the outer or brace member-sot carrie -Irames. Each bur-Let element may be se ured to the frame-bars by means of screws K which pass through flanges of the bucket-elements. Examination of Fig. 5, for instance, will she w that if one element that designated J", for instanceis removed. the sandholder will deliver a shorter line ofsand-for a shorter flask-than if all elements are retained and kept; in use. The

keyedFig. t-thereto.

like result may be attained by blocking; oil.

a part of a sand-holder--tor instance, bv filling a plate HClUha' the compartment l F ig. l of a holder.

Preferably, the machine will have a packing-plate L, pivoted at M and movable upwardly against a spring M, and restricted as'to downward movement by a stop M". A number of fingers, {or slides, M, are pivoted at m to the packing-plate L.

It has been before stated that the machine has a regulating frame, 15.. Said frame composed, principally, of channel beams, 4:, e and if. It is pivoted on and adjustable a ound the shaft F, and for this purpose, the lower arm of the frame carries a plate, X, having its lower end slotted- .said slot, is also provided with a head having a threaded opening through it, whereby it engages a sen. r, O, which is rotatable by means of a handle (.2, Rotation, in one direction or the other, advances or retracts the frame F. At its upper end, said frame, E, carries a retarding device, intended to temporarily, and successively, hold each carrier and its sand-holder against movement without interrupting continuance of rotation of the shaft F and of the casting G As a consequence of these returdations, each spring,1, I I, is put under a tension strain, and, when the corresponding sand-holder has passed the retarding device, the strained spring pulls the. carrier, quite violently. until stopped 'v' i, v by an otisct stop, y, g", g"; this suddcnstop-v of strip ll i sufficient to temporarily' resist the pull of any one of the springs I, I I.

As shown in Fig. 1, the carrier 11, or any othcnbrings the extreme outer edge of a sand-holder, J, against the underside of strip R. and the resistance of the latter is sutlicicnt to temporarily retard movement of the holder even though the casting G continues to move. a stretching of spring, 1 or any other, until the strain of the spring is sullicient to overcome the stillness, or sprmginess, of strip R, whereupon the sand-holder slips along .the under-side of the strip. the carrier-frame arm being, drawn along by means of the still-strained spring, until the holder parts from the strip. Immediately the holderis released, spring I violently pulls the arm This retardation causes i 1 i i a l 1 to and against an onset stop. This inter-t ruption of the high throwing speed thus im- 1 pzrted to the arm, causes sand to be flung from the holder and, quite violent-l toward 5 a flask. The positioning of the strip, P.,- todecide the moment of interruption of the sand-holder,' as well as the duration thereof--is assured by means of a screw-shaft T, revolnble in a supportwvhich is bolted. as shown in Fig. l, to the upper bar, (5" of the swinging frame F; The shaft T has a controlling-handle at one end, while a screw thread. at its rear end tits a threaded block, S, for engagement with a slot in the upper arm of lever, S. Rotation of shaft T. causes forward or rearward mo"ements of block 8, and the swinging of the lever S, to lower or to raise the front, or intercepting end, of the strip It. Thus, the retardiin device, while bodil carried by the movabIe frame F, is adjustable independently of that frame.

In addition to the springs, I, I I, which draw and hold the carrier-frame arms against the offset stops,-g g", g, I show the employment of latches 'which automatically lock each of the arms to-the corresponding ofi'set stops and also means which effect unlocking of said parts when a sandholder is to be'retarded and a spring. I, I I", is to be strained. The particular advantage. of utilizing such latches is to prevent the separation of the carrier-frame arms from their stops while the sand-holders )ass through the mass of sand in the chambet I) and against and past the packing ,late L. The weight of such mass of sand. and the resistance of springs M"; tend to cause separation of the arms from the stops and unnecessary strains of the springs I. 1 I

In the drawings, I show each carrierframe arm provided with a latch, V, pivoted at' it and having, at its rear end. a pin. Y, which is elastically connected. by a spring 3 with the corresponding carrierframe arm. The pin Y. as shown in 2 and 4, extends, for a considerable distance beyond the outer side of the corresponding carrier-frame arm. H. The forward end of each latch is provided with a hook X. for engaging an ott'set stop. as shown in Fig.

In order to operate the latches. 1 pryvide a cam Z, and said cam. sL-yia-n .n Fig. 2, to the channel-beam 1 of the regulating frame E. Said cant, as shown in 'Fig. 1, has a beveled underside. As the shaft F rotates. and carries, with it, casting G and the carrier-frame arms, each pin Y strikes against. the cam 2. and is pushed down to unlock the forward. or hooked, end. X, of its latch from the corresponding ofl'set stop. This occurs at or about the moment the outer edge of the sand-holder touches the retarding plate R, and as said holder pin Y will be drawn entirely past cam Z, as

shown in Fig. 1.

In operation, the illustrated machine acts as follows; The hopper gate 1? is moved and the discharge port 0 is opened; the sand falls down the chute and into the compartment at D theshaft F is rotated, and the casting G and the associated carriers are rotated with it, in the direction indicated by the arrows in Fig. 1. This draws the buckets. or sand-holders. through the sand in the chute, and the buckets are heaped full and drawn against the elastically-yielding plate L; said packing-plate is then in the position shown by dotted lines Fig. 1, and cmnpresscs the sand in each holder as the latter successively pass underneath the plate; after this compression, :1 sand-holder is drawn upwardly, moving the packing-plate. L. to the position shown by full lines, andj nst before it reaches the retarding-device, the corresponding pin Y is forced against the cam Z,

and the hooked end of the latch V disengages the oilset stop; before the latch is returned by spring y. the sand-holder has been brought against. the retarding device, and the latter holds the carrier-frame back, even though the casting G still continues to rotate as it must do, being keyed to the shaft. The retardation of the carrierframe, causes the corresponding spring I, I or I to be put under strain. This yielding means is further strained as the rotation of the driven shaft, F. continues, t ntilrthe sandhclder has been drawn past the retarding device, whereupon I becomes ett'ective and draws the carr er-frame, with more or less violence. dependent upon the strength of the spring and the position of the retarding device. against the oil's-ct stop g, as shown by dotted lines in Fig. 1. The stop, saddenly arrests th carrier frame. and this sadden arrest causes the contents of the bucket to be dung. or thrown, therefrom and toward the flask. Sinmltancously, the latch 1.- engages with the stop g, locking the carrierframc to the casting-arm. These parts remain locked together during a greater partof a revotution around the axis of the shaft F. By this means. springs. I. I I", are relieved from strain while the. buckets are being drawn through the massoi' heavy and in the lower part of the chute 1). Any tendency of sand to pack at or below the discharge port will be overcome by the sliding movements of fingers M.

It will be seen that my machine picks up uniform amounts of sand. packs these uniformly. and throws the same uniformly. As a consequence. the sand is rammed uniformly into a flask. and is solidly deposited therein, due to the throwing or flinging exerted by the machine.

The supply of sand is adjustable, the retardation and force of throw of the carriers are both adjustable, and the direction of the throw is, by varyingthe position of the frame E, adjustable.

\Vhat I claim is:

1. In a mold-filling machine s movable sand-holder, means for assuring a supply of sand thereto, a device for temporarily retarding the movement of said holder, and means for moving said holder out of its en gagcment by said device and toward a point for discharge of sand from said holder.

2. In a mold-filling machine, a sandholder, means for assuring a supply of sand thereto, yielding means for moving said holder, and a device for temporarily retarding the movement of the holder and putting the yielding means under strain.

In a mold-filling machine, a carrier, a sand-holder carried thereby, means for. as suring asupply to said holder, yielding means for moving said carrier, and a device for temporarily retarding the movement of the carrier and putting the yielding means under strain.

4. In a mold-filling machine, a carrier, :1 sandholder carried thereby, means for packing sand in said holder, means, for moving said carrier, a device for retarding the movement of the carrier, and-a spring strained by the retarding device and independently operating the carrier.

5.111 a mold-filling machine, an operating-shaft, a sand-holder yieldingly connected with said shaft, and a device for retarding the holder relatively to the shaft. and temporarily putting the yielding means under strain, and for releasing said holder While the releasing means is still strained.

6. In a mold-filling machine, a rotatable shaft, a plurality of radially disposed carriers, each separately and pivotally connected with said she ft, springs also yieldingly connecting each carrier with the shaft,

sand-holders mounted upon said carriers, means for feeding sand to said holders, :1 sand-packing device in the path of movementof tl10 l10l(l8l$,tlll(l means for .successivclv retarding the carriers and putting the corresponding spring under strain, and for releasing said carrier while strained.

7. In a mold-filling machine, a sandholder, means for assuring a supply of sand to said holder, means for giving a quick and limited throw to the holder, to fling the sand thcrefron'i, and means for adjusting the angle of the throw.

8. In a mold-lillin machine, a plurality of sand-holders, means for assuring a supply of sand to the same, means, including yielding connections, one for each holder, for bringing the latter, in succession, to a common point of discharge, and means for holder separately and putting the corre;

spending yicldin 7 means under strain. 3"

9. In a moldlling machine, a movabl -shaft, a casting connected with said shaft', :1 carrier pivoted on the saaft, a spring con necting said carrier and said casting, a latch for securing said parts together, and means for operating the'l'atch.

10. In a mold-filling machine, a rotatable carrier, a movable stop therefor, a spring for throwing said carrier toward said stop, arid a latch for temporarily holding the carrier against the. stop and rendering the spring inetfectivc.

12, In a mold-filling machine. a rotatable shaft, :1 devicerotatable therewith and provided with a plurality of stops, a plurality of carrier-scurried by and mounted to rock upon said shaft, springs connecting said carriers with said first-named device, and tenling to draw said carriers against said stops, latches for holding the carriers in the last named position, means for operating the latches separately and in succession for releasing cach carrier from its stop, means for retarding the'operation of :1 released carrier, and sand-holders mounted upon the carriers. 13. In a mold-filling machine, a movable carrier, :1 sand-holder carried thereby, a stop for the carrier, a spring for throwing said carrier toward the stop, a device for temporarily retarding the carrier, and means for adjusting said retarding device.

1%. In a mold-filling machine, a movable carrier and a sand-holder, of variable capacity, consisting of a bucket-frame at one end of the carrier and a plurality of buckets constituting said sand-hold r and each rev I movably secured to said bucket-frame.

15. l n a mold-filling machine, a movable carrier and a succession of buckets each removably secured to said carrier and constituting a sand-holder of variable capacity.

16. In a mold-filling machine, a movable carrier, a sand-holder carried thereby and comprising a succession of huckets'arranged end to out the end member of said succession being removably secured in place.

temporarily retarding the movement of each 17. In a mold-filling machine, a carrier,

a sand-holder carried thereby and haiiing 20. In a mold-killing machine, a movable means for varying its capacity, and means} sa11d-1101der, means for assuring a supply of for operating saidcmrier. send therein, an elastic device for tempo- 18. In a mold-filling machine, a carrier, rzn ily retarding the movement-0f said holder, 8 a long and comparatively narrow sand and means for moving said holder out of its holder carried thereby and variable as to its engagement by said device and toward a length, and means for operating the carrier. point of disc! urge of sand from said holder. 19. In a mold-filling machine, means for In testimony whereof, I have signed my holding a mass of sand, 21 spring-mounted name to this specification in the presence of 10 carrier, a sand-holder carrier thereby, means two subscribing witnesses.

for causing the carrier to draw the sand- JAMES ANDERSON. holder though the mass of sand, and means \Vitnesses: for locking the 5 ring from strain While the W'M. H. TRUESDELL, v carrier is being Lrawn through said mass. G. R- THOMAS. 

